Hello ecru, welcome to the forum. I'm sure you will find differing opinions on this site, and I will you tell you that I don't think it matters that much unless you do an integrated program at a well known school that has a tie in with an airline, like FTE and Flybe, or what Oxford and Netjets had for example. Otherwise, I don't think it would make a difference if you went famous school vs no-name school.
The good thing about choosing the schools that you have chosen is that you will get a UK licence and not a Spanish one. You could save some money though with other schools. Just my two cents.